﻿using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web;
using BaseData;
using BaseLib.Helper;
using BaseUtility;
using Newtonsoft.Json;
namespace WebUI.Ashx.App
{
    /// <summary>
    /// UploadFilesBrowser 的摘要说明
    /// </summary>
    public class UploadFilesBrowser : Base, IHttpHandler
    {
        private static readonly AccClass _accId = new AccExts(new GetAccType().Parse(Request.QueryString["url"])).Instances;
        public void ProcessRequest(HttpContext context)
        {
            if (_accId.Id == 0 || string.IsNullOrWhiteSpace(_accId.Name) || _accId.Type == 0) return;
            var aspxUrl = context.Request.Path.Substring(0, context.Request.Path.LastIndexOf("/", System.StringComparison.Ordinal) + 1);
            //根目录路径，相对路径
            const string rootPath = "/attached/";
            //根目录URL，可以指定绝对路径，比如 http://www.yoursite.com/attached/
            var rootUrl = "/attached/"; // aspxUrl + "../attached/"
            //图片扩展名
            const string fileTypes = "gif,jpg,jpeg,png,bmp";
            var currentPath = "";
            var currentUrl = "";
            var currentDirPath = "";
            var moveupDirPath = "";
            var dirPath = context.Server.MapPath(rootPath);
            var dirName = context.Request.QueryString["dir"];
            if (!String.IsNullOrEmpty(dirName))
            {
                if (Array.IndexOf("image,flash,media,file".Split(','), dirName) == -1)
                {
                    context.Response.Write("Invalid Directory name.");
                    context.Response.End();
                }
                if (dirName.Compare("image") || dirName.Compare("file")) dirName += "s"; // 将kindEditor默认的文件夹image和file分别加上s。
                dirPath += dirName + "/";
                rootUrl += dirName + "/";
                if (!Directory.Exists(dirPath)) Directory.CreateDirectory(dirPath);
            }
            //根据path参数，设置各路径和URL
            var path = context.Request.QueryString["path"];
            path = String.IsNullOrEmpty(path) ? "" : path;
            if (path == "")
            {
                currentPath = dirPath;
                currentUrl = rootUrl;
                currentDirPath = "";
                moveupDirPath = "";
            }
            else
            {
                currentPath = dirPath + path;
                currentUrl = rootUrl + path;
                currentDirPath = path;
                moveupDirPath = Regex.Replace(currentDirPath, @"(.*?)[^\/]+\/$", "$1");
            }
            //排序形式，name or size or type
            var order = context.Request.QueryString["order"];
            order = String.IsNullOrEmpty(order) ? "" : order.ToLower();
            //不允许使用..移动到上一级目录
            if (Regex.IsMatch(path, @"\.\."))
            {
                context.Response.Write("Access is not allowed.");
                context.Response.End();
            }
            //最后一个字符不是/
            if (path != "" && !path.EndsWith("/"))
            {
                context.Response.Write("Parameter is not valid.");
                context.Response.End();
            }
            //目录不存在或不是目录
            if (!Directory.Exists(currentPath))
            {
                context.Response.Write("Directory does not exist.");
                context.Response.End();
            }
            //遍历目录取得文件信息
            var dirList = Directory.GetDirectories(currentPath);
            var fileList = Directory.GetFiles(currentPath);
            switch (order)
            {
                case "size":
                    Array.Sort(dirList, new NameSorter());
                    Array.Sort(fileList, new SizeSorter());
                    break;
                case "type":
                    Array.Sort(dirList, new NameSorter());
                    Array.Sort(fileList, new TypeSorter());
                    break;
                case "name":
                    Array.Sort(dirList, new NameSorter());
                    Array.Sort(fileList, new NameSorter());
                    break;
                case "time":
                default:
                    Array.Sort(dirList, new NameSorter());
                    Array.Sort(fileList, new TimeSorter());
                    break;
            }
            var result = new Hashtable();
            result["moveup_dir_path"] = moveupDirPath;
            result["current_dir_path"] = currentDirPath;
            result["current_url"] = currentUrl;
            result["total_count"] = dirList.Length + fileList.Length;
            var dirFileList = new List<Hashtable>();
            result["file_list"] = dirFileList;
            foreach (var t in dirList)
            {
                var dir = new DirectoryInfo(t);
                var hash = new Hashtable();
                hash["is_dir"] = true;
                hash["has_file"] = (dir.GetFileSystemInfos().Length > 0);
                hash["filesize"] = 0;
                hash["is_photo"] = false;
                hash["filetype"] = "";
                hash["filename"] = dir.Name;
                hash["datetime"] = dir.LastWriteTime.ToString("yyyy-MM-dd HH:mm:ss");
                dirFileList.Add(hash);
            }
            foreach (var t in fileList)
            {
                var file = new FileInfo(t);
                var hash = new Hashtable();
                hash["is_dir"] = false;
                hash["has_file"] = false;
                hash["filesize"] = file.Length;
                hash["is_photo"] = (Array.IndexOf(fileTypes.Split(','), file.Extension.Substring(1).ToLower()) >= 0);
                hash["filetype"] = file.Extension.Substring(1);
                hash["filename"] = file.Name;
                hash["datetime"] = file.LastWriteTime.ToString("yyyy-MM-dd HH:mm:ss");
                dirFileList.Add(hash);
            }
            context.Response.AddHeader("Content-Type", "application/json; charset=UTF-8");
            context.Response.Write(JsonConvert.SerializeObject(result));
            context.Response.End();
        }
        public class NameSorter : IComparer
        {
            public int Compare(object x, object y)
            {
                if (x == null && y == null) return 0;
                if (x == null) return -1;
                return y == null ? 1 : System.String.Compare(new FileInfo(x.ToString()).FullName, new FileInfo(y.ToString()).FullName, System.StringComparison.Ordinal);
            }
        }
        public class TimeSorter : IComparer
        {
            public int Compare(object x, object y)
            {
                if (x == null && y == null) return 0;
                if (x == null) return -1;
                return y == null ? 1 : System.DateTime.Compare(new FileInfo(y.ToString()).LastWriteTime, new FileInfo(x.ToString()).LastWriteTime);
            }
        }
        public class SizeSorter : IComparer
        {
            public int Compare(object x, object y)
            {
                if (x == null && y == null) return 0;
                if (x == null) return -1;
                return y == null ? 1 : new FileInfo(y.ToString()).Length.CompareTo(new FileInfo(x.ToString()).Length);
            }
        }
        public class TypeSorter : IComparer
        {
            public int Compare(object x, object y)
            {
                if (x == null && y == null) return 0;
                if (x == null) return -1;
                return y == null ? 1 : System.String.Compare(new FileInfo(x.ToString()).Extension, new FileInfo(y.ToString()).Extension, System.StringComparison.Ordinal);
            }
        }
        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}